Efficacy of mesenchymal stem cell-delivery using perpendicular multi-needle injections to the skin: Evaluation of post-ejection cellular health and dermal delivery

Research output: Contribution to journalJournal articleResearchpeer-review

  • Filip Rangatchew
  • Bo Sonnich Rasmussen
  • Jesper Dyrendom Svalgaard
  • Eva Haastrup
  • Maj Lis M. Talman
  • Christian Bonde
  • Anne Fischer-Nielsen
  • Krzysztof T. Drzewiecki
  • Holmgaard, Rikke
  • Lea Munthe-Fog

Aim: Mesenchymal stem cell (MSC)-therapy is increasingly being evaluated in clinical trials. Dermal delivery is not only time consuming but also unreliable, potentially hampering the therapeutic result. Therefore, qualification of cell delivery protocols is essential. This study evaluated a clinically relevant automated multi-needle injection method for cutaneous MSC-therapy, allowing the skin to be readily and timely treated, by assessing both the cellular health post-ejection and dermal delivery. Methods: Following dispensation through the injector (31 G needles: 9- or 5-pin) the cellular health and potency (perceived- and long-term (12 h) viability, recovery, metabolism, adherence, proliferation and IDO1-expression) of adipose-derived stem cells (10–20–50 ×106 cells/ml) were assessed in vitro in addition to dermal delivery of solution in human skin. Results: No significant detrimental effect on the perceived cell viability, recovery, metabolism, adherence or IDO1-expression of either cell concentration was observed. However, the overall long-term viability and proliferation decreased significantly regardless of cell concentration, nonetheless marginally. An injection depth above 1.0 mm resulted in all needles piercing the skin with dermal delivery from up to 89% needles and minimal reflux to the skin surface, and the results were confirmed by ultrasound and histology. Conclusion: The automated injector is capable of delivering dermal cell-doses with an acceptable cell quality.

Original languageEnglish
JournalBurns
Volume49
Issue number3
Pages (from-to)633-645
Number of pages13
ISSN0305-4179
DOIs
Publication statusPublished - 2023

Bibliographical note

Publisher Copyright:
© 2022

    Research areas

  • Cell therapy, Dermal delivery, Injection, Mesenchymal stem cell, Regenerative medicine, Skin therapy

ID: 316553766